Coca-Cola says it's cooperating with investigators. It says some of its bottling plants use mapping and location technology that is widely available commercially in China to improve the efficiency of deliveries.

Authorities in the southwestern province of Yunnan said Coca-Cola employees were found last month improperly using handheld global positioning system devices. It says that was one of 21 similar cases.

China's government tightly controls map-making activities due to both national security concerns and political sensitivities about its borders.